Breakdown gun.



atenfed Dec. H. 2900.

W. THPSN. BREKWN GUN. 'Apgucmion md Emy s1, 1900 @miba/Lawa@ av/JWM ing the hammer, dac.

'trigger safety device, said means acting in Ulivi-rs drains LLIAM THOMRSGN,

0F FREMGNT, 'OHCA BREAKDOWN GUN.

SPEXFIGATION forming part of Lettere .Fatemi No. 663,669, dated December l1, 1900. Applicatie); iled May 31, 1900- Serial No. 18.622, illu model.)

o at'f whom it may con/cera:

Beit known that I, WILLIAM THOMPSON, a citizen of the United States of America, residing at Fremont, in the county of Sandusky and State of Ohio, have invented certain new and useful Improvements in Guns, of which the following is aspeciiication, reference oeing had therein to the accompanying drawings. w

This invention relates to guns, and particu larly to breech-loading guns, in which 'the movement of the barrels is utilized for cock- 'lhe objects of the invention are: First, to provide mainsprings slidable longitudinally of the iocks and adapted to travel on the hammers in such manner that the pressure ofthe springs will be exerted more directly on the pivotal pins oi' the vhammers when cocked rather than on 'the ends of the same; second, to provide a lcver'to take motion-from the harrel and act, in conjumztion with the sliding springs, for cooking the hammers; third, to provide novel means for manipulating the conjunction with mechanism for controlling the barrel-locking holt, so that the bolt? cannot be manipulated unless thetrigger safety device set to prevent movement of the trigger, and, fourth, to produce agen-lock and mechanism in connection therewith which will prove durable, eliicient, and satisfactory in use, and comparatively inexpensive to manufacture.

Vith the above and other objects in view' the invention consist-s in the details of construction and in the arrangement and combination of parts to be hereinafter more fully set forth and described.

In describing the invention in detail referings,forining part of the speciicatiomwherein once will be had to the accompanying drawi" characters denote corresponding parts in everal views, and in which- Figure 1 is a view of a fragment of a gun stock and barrel partly in longitudinal section; Fig. 2, a. fragment of the lock, showing the position of the spring and hammer when released; and Fig. Slis aplan viewof the slide for operating the safety device.

in the drawings, 1 denotes a frame, and 2 upper and lower tangs of the frame.

the front extension thereof. The triggers l areof any preferred construction and have their upper edges engaged by springs 4, seated in a bridge-plate The spindle of the safety device 6 has its ends reduced to form tenons which are rotatably mounted in the The lowerportion of the safety device is adapted io lie between the triggers out of engagement therewith, ont is capable of. being turned across and into engagement with the triggers through the agency of a segmental pinion 7, which is engaged by the toothed rack 8mm the sliding plate 9. The rear end of the plate 9 is slotted to receive the shank iQof the thumbpiece 1l. A lug l2 is formed ar. the front end of the slide and engages a shoulder 13 on the bolt iai, which latter controls the mechanism for releasing the barrels. `The lug 2 engages the shoulder 'i3 of the bolt when the slide is pushed forward, and when the slide is in the forward position the locking device is out-of engagement with the triggers. As the barrel-locking holt is turned the slide is actuated to automatically throw the triggerlocking mechanism into engagement with the triggers. A slot i4 is formed inthe slide for the reception oi.' its guarding and retaining Each hammer iS has a lug 19, which is enl gaged by a lug 2l) on the end of a lever 2l, said ievcr being pivoted between the ham mers. rlhe forward end ol theiever 2l is provided with adog 22, pivoted thereto,engaging a shoulder 23 of the lug 2li, formed on the barrel 25. lhe dog is engaged hy a spring 2G, seated in the end of the lever 2l for retaining it in engagement with the lug. As the gunharrels are swung down the lever 2l is elevated, and the movement thereof being communicated to the rear end of the lever the lugs thereof engage 'the lugs ot' the hammers and force the hammers hack into cocked posiiion. The front face of the hub of cach ICO hammer has two rounded shoulders 27 2S, connected by a slightly-eurvct'l surface forniing a bearing for one end of the mainsprng. The mainsprng 29 has one end bearing against a flange 30 of the frame and its opposite end provided with an antifrietionroller 3l, which travels on the edge of the above bearing and engages the shoulders thereof.

Action-pins 3:2 are slidable in waysformed in the frame extension 2 and project from the front end thereof. 'lile action-pins 'are provided with bearing-surfaces 2523, adapted to engage the mainsprilngr and impart thereto a sliding movement. As a result of such movement the roller 3l on the spring is forced from the shoulder 2701i the hammer inteensagement with the shoulder 28 thereof, which is above the pivotal point of the hammer. Such movemcntaids in cooking the hammers, and by reason of the changed position of the spring the pressure exerted is practically in line with the pivotal piu of the hammers. When the triggers are pulled, the roller travels down the curved surface withincreasing leverage and efficiency. 'l'he action-pin is operated through the medium of cam-recesses formed in the end 34. The cam-recesses terminate vin channels 35. in order that the action-pins may have free movement when the hammers a're cocked and the barrels are locked.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a gun, a front extension, an actionpin slidable in the front extension, a mainspring having its loop bearing ag einst the action-pin, a hammer having two shoulders connected by a curved surface, a roller on the end oi' the mainsprint,r engaging the shoulder near the pivot ot' the hammer when said hammer is cocked and so arranged as to travel over the curved surface with increasing,r leverage, a lug on the side of the hammer, said halnmerhaving notches, sears having notches adapted to engage the notches 'of the hammer, a cooking-lever, a lug on the rear end thereof for engaging the lug of the hammer, a barrcha lug thereon having a shoulder and a dog pivoted on the cooking-lever adapted to engage the lug on the barrel, substantially as described.v

2. In a gun, a frame, a front extension, suitable triggers having their upper edges engaged by a spring, a spindle having its ends reduced to form tenons, said tenons being mounted in the frame between the triggers, a sliding plate, a toothed rack on the plate, and a segmental pinion near the upper edge of the spindle.

3. Ina gun, a frame, a frontcxtension, suitable triggers having theirupper edges engaged by a spring, a spindle having its ends reduced to form spindles, said spindles heilig mounted in the frame between the triggers, a sliding plate, having a Slot at one end, a thumb-piece on the frame, a shank depending from the thumb-piece and passing through a slot in the-frame and adapted to enter the slot of the plate, a slot in the opposite end of the plate, a guarding and retainingr screw adapted to pass through said slot and engage the frame, a toothed rack onthe sliding plate, a segmental pinion near the top of the spindle, barrels, and means for releasing the barrels.

4. In a gun, aframe, a frontextension, snit able triggers having their upper edges engaged by a spring, a spindle having its end reduced to form spindles, said spindles being mounted in the frame between the triggers,

a slidingV plate, having a slot at one end; a

thumb-piece on the framea shank depending from the thumb-piece and passing through a slot in the frame and adapted to engage the slot of the plate, a slot in the opposite end of the plate, a guarding and retaining screw adaptedto pass through said slot and engage the frame, a toothed rack on the sliding plate, a segmental pinion near the top of the spindle, barrels, a lug on the slide, a bolt and a shoulder on the bolt adapted to be engaged by the lug ol' the slide.

WILLIAM THOMPSON.

Witnesses:

D. B. Lovin, A. E. (fbnnun'r. 

